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iommu/vt-d: Use struct_size() helper

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.

So, replace code of the following form:

size = sizeof(*info) + level * sizeof(info->path[0]);

with:

size = struct_size(info, path, level);

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Gustavo A. R. Silva 2019-04-18 13:46:24 -05:00 committed by Joerg Roedel
parent f7b0c4ce8c
commit 553d66cb1e
1 changed files with 1 additions and 1 deletions
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drivers/iommu/dmar.c
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@ -145,7 +145,7 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
for (tmp = dev; tmp; tmp = tmp->bus->self)
level++;
size = sizeof(*info) + level * sizeof(info->path[0]);
size = struct_size(info, path, level);
if (size <= sizeof(dmar_pci_notify_info_buf)) {
info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf;
} else {